(CNN) -- Police in Gwinnnett County, Georgia, spent Sunday looking for a gunman who opened fire at a party, injuring five teens.

The incident took place Saturday night in the Snellville area, about 25 miles northeast of downtown Atlanta.

At around 11 p.m. Saturday, an unknown assailant shot four teenagers who were attending the party. A fifth was grazed by shrapnel from the shooting. All five were treated at an area hospital and released.

Police said the descriptions provided by witnesses are so varied that it has been difficult to narrow the lists of suspects.